Raya Holding is an Egyptian investment conglomerate.
Rahmani, the head of Ennahar, had been on trial for violation of foreign exchange regulations.
The news comes a year after the his energy firm acquired a strategic 40-percent stake in SOLA Group.
The news comes after the group signed a three-year wage agreement with its gold mine workers.
Rabiu is now Africa's fifth-richest man.
Adenuga derives the majority of his wealth from his telecom company and his investments in the Nigerian oil industry.
The move comes nearly a year after the British energy giant announced plans to divest its interests in Nigeria.
His company Dahabshiil has grown into a leading African money transfer business.
Ndlovu made a fortune through controversial PPE contracts.
The LSE's statement comes just a few weeks after Orjiako retired as chairman.